"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZFY-ZV9 : 19 February 2021), A Mary Callanan in household of Patrick Callanan, Corning, Steuben, New York, United States; citing enumeration district ED 170, sheet 131A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,254,933.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSGD-4KD : accessed 15 August 2021), Mary Callahan in household of Patrick Callahan, Corning city Ward 4, Steuben, New York, United States; citing enumeration district (ED) 77, sheet 7B, family 136, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,163.
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